Induction of organogenesis and callogenesis in Limbarda crithmoïdes L. (Asteraceae) explants cultured on MS media supplemented with various concentrations of Na+ and K+

Abstract

The present work describes an efficient micropropagation and callus induction protocol of Limbarda crithmoïdes L. (Asteraceae), a halophyte species with medicinal and horticultural interests. The objective was to identify the culture media that support the best organogenesis and callogenic expressions of four types of aerial explants; nodal and internodal segments and leaf portions, by varying the mineral composition of twenty culture media by adding increasing concentrations of Na+ (from 0-100 mM) and K+ (from 0-50 mM). After two months of culture, parameters relating to the various expressions of organogenesis and callogenesis were measured. Results showed that the K+ and Na+ interactions affect the explants development. The combination of high concentrations of Na+ (50, 100 mM) and K+ (50 mM) ions allowed the most important regeneration of the axillary shoots (70.6-100%), root neoformation (82.6-96.1%) and callus induction (76.3-100%). Rooted plantlets with well-developed axillary shoots have been successfully acclimatized with a 93% of survival rate. The selected media would allow a large-scale multiplication of this medicinal species, without adding exogenous phytohormones, and could be used for the micropropagation of other threatened halophyte species or for the production of callus; rich in secondary metabolites.

Appraisal of the Physiological Response of Cakile maritima and Brassica juncea for Tolerating Lanthanum Stress

“…Damage in the DNA structure induced by La was shown in Vicia faba L. seedlings [69]. This effect could lead to a disruption of nutritional balance in plants [68][69][70][71].…”